Picker-motion.



G. POTSTADA.

PICKER MOTION.

7.1914. RENEWED 1111111251916.

APPLICATION FILED IAN. 2 I

Patented June 13, 1916.

2 SHEETS-SHEET I.

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IWITNESSES.-

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PICKER MOTION. APPLICATION man JAN. 21. 1914. RENEwD MAR. 2

Patented J une 13, 1916. 2 SHEETS-SHEET 2 mmm... H w Sv.

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ED' STAEN GEORGE POTSTVADA, OF SAN FRANCISCO, CALIFORNIA.

PICKER-MOTION.

incasso.

Specification of Letters Patent.

* Patented-aune 13,1916.

Application filed January 27, 1914, Serial No. 814,696. 'Renewed March25, 1916. `Serial No. 86,800.

To all 'whom t may concern.'

Be it known that I, GEORGE Po'rsiTADA,a citizen of the United States,residing at vSan Francisco, in the county of San Francisco and State ofCalifornia, have invented anew and'usefull Picker-Motion, of which thefollowing is a speciiication in such full and clear terms as will enablethose skilled in th art to construct and use the same.

in the drawing in which the same reference numeral is applied to thesame portion throughout, but I am aware that there are manymodifications thereof.

Figure 1 is a front elevation of the lay of a loom, a portionponly ofthe supporting frame being illustrated, Fig. 1A is a bottom plan view ofthe driving cam andV yoke operated' thereby.' Fig. 2 is a. plan view ofsaid lay, Fig. 3 is a side elevation of the lay4 and a portion of the'frame and loom looking in the direction of the arrow Fig. 1. Fig. 4 is aview partly in 1 4section of a portion -of the lay illustrating theslides which open the shuttle jaws, Fig. 5 is aside elevation of theadjusting. screw used for releasing the picker lock, and Fig. 6 is anAend elevatlon of the cam end of the picker lock adjusting screw.

This invention relates vto a picker operator r 4for looms and its objectis to4 provide means lay is pivotally connected by the usual swords 3and 4, the lay swords supporting an whereby the shuttle will at alltimes be given a positive and equal speed.

' Another object of the .invention is to profy duce a picker operatorwhich will require less power than the common forms of pickeroperator's,'and which will be positively operated at all points. Whilethis-picker armis shown in connection with a particularl type of loom inwhich'a shuttle is used to. carry the weft threads from large spools ateach side of the loom, the operating mechanism is equally applicable toany shuttle, the impulse. thereto being given by means 'of a vacuumcylinder.

The numerals 1 and 2 represent portions of two side frames of the loomto which the angle iron 5, which in turn supports a `flat member knownvvas the lay bed 6, the reed through which the warp threads pass beingomitted for purposes of Iillustration.

Depending from the angle iron 5 are the bearings 7, 8, 9,'10 and 11. Thebearings 7 and 11 carry the -weft measurers 12 and 13,

An embodiment of the invention is showny 18 which hubs pass through thebearings 7 and 11, and set screws 19 and 20 secure said weft measurersin place.

The weft measurers are fully described and set forth in application Ser.No. 814,698,

led Jan. 27, 1914, and form no part of the present invention and are notincluded herein. They are intended to present the ends Aof the weftthreads successively to the shuttle jaws.

The tube 15 has a clamp 22, which clamp has a portion 23 inclinedforwardly and upwardly which extends through the angle iron 5 and laybed 6 to afford the backing for the picker arm 24 to strike on. Thereare two picker arms 24 and 24 which are pivotedv on thev lay swords at25. The tube 1 5 also has two clamps 25 and 27 thereon, which clamps areon their back provided with cam surfaces 28 and 29, the object of whichis to release the jaws-of the weft carrier as will b e later explained.

. Below the bearings 8 and 9 there' is a cast` ing 30, the ends of whichat 31 and 32 are clampedl respectively to the tubes 15 and 16,

' while at 33 and 34 said casting is provided The tube 16 adjacent thebearing 10 has a4 clamp 36 with an upwardly extending arm I 37 pivotedto a lever 38, said lever being v pivotedbehind the tube 16 at 39 to theangle iron '5, while the lower end of said lever extends into the vacuumcylinder 40 and is connected with the piston rod 41 for a purpose to belater explained. Adjacent the I picker arm 24 the tube 16 has two' camclamps 42 and 43 substantially the same'as the clamps 26'and 27, butreversely placed,

while immediately adjacent the clamp 43 is a clamp 44, the same as theclamp 22, also reversely placed with respect to the clamp 22.'

Between the'bearings 8 and 9 there is a yoke 45 which affords a bearingfor the shaft 46 and which also .has two bearings 47 and 48 throughwhich the Shaft 14 extends. The shaft 46 has a bevel gear 49 in meshwith a bevel Ygear 50 on the shaft 14, said shaft 46 being drivenfrom-.any suitable source of power, not' a part of -this invention.

Thevacuum tube 40 is vsupported/by means of brackets 51 and 52 which areconnectedv with the angle iron 5. This vacuum tube is provided with twopistons 53 and 54 on the piston rod 41 and with oppositely operatedpistons 56 and 55 on the piston rods 57 and 58 extending through guideboxes 59l and 60 on the ends of the cylinder 40.

Each pickerar'm extends up through the slot in the angle iron 5 andthrough the lay bed, and is provided with a lug 61 Whichengages an Lshaped catch 62 .pivoted on f blocks having their ends shaped to causethe blocks 63 and. 63 connected respectiveljiT with the clamps 22 and44. Each block 63 and 63 is provided .with a spring shuttlepositioner-64- Thelay bed has a block 55 adjacent each shutterpositioner, each of said inclined portion 66 of each shuttle positionerto move the shuttle positioner outwardly out of engagement with theshuttle oi-.weft carrier when the weft carrier is about to be releasedto travel through the shed. The blocks 65 also afford means to preventthe weft carrier from being dislodged during lthe several operationswhich occur at the end of its travel each time it picks upf the yarn.

The depending bearings 7 and 11 are each provided with a screw asillustrated at 68 and 69,' each of which screws has a cam Surfacethereon at 7 0 for the purpose of striking the depending arms of thehooks'62, the position of said cam determining the precise moment ofrelease of said hook, the left.

hand hook in Fig. 1 being shown .as of the insta-nt` of release. v

Each picker arm is provided with .a yoke 71 which yokes are connectedwith the pis?A v ton rods 57 and 58 by means of threaded rods 72 and 73,said rods being secured in a given adjustment by means of Vlock nuts 74and 75. The. lay is worked back and forth in a well known manner bymeans of -links 76 and 77 connected with ears 78 and 79 bolted on theback of the angle iron 5;

. The camA clamps 26, 27 and 42, 43 operate j slides 81, 82, 83 yand 84respectively, saidslides each lhaving a slot and being secured inrplaceagainst the inner sidel of the angle iron'5 by means of Screws 85, 86,87 and 88. Eachof `the SlidesSl to-84 has-an upwardly extending arm 90connected therewith. Each arm is U shaped at its upper end and the shortleg of each carries a roller 91, said rollers being for the purpose ofopening the jaws at the ends of the carrier used'with this loom inamanner to be later explained.

. Each of the armsA 90 has a spring 92 to cause the arms to remainnormally in the position 'shown in Fig. 1, a plateQO covering vthesprings and the block and beneath which Vthe carrier passes.

The operation of the apparatus is as follows: xaminingFig. 1 it will beseen that the'ho'o 62 at the left end of the lay isljust about to bereleased from the -lug 61 on the picker arm. Thereupon the piston 55will be drawn by the vacuum' forcibly against the piston 53, the shockof the throw being taken by the picker arm at the end of the slot 80,the slot 80 at the opposite end of the lay acting in the same mannerwith respect to the other picker arm. At this same time it will beobserved that the cam clamps 27 and 26 have passed over-the cam slides81 and 82, thus releasing the rollers'91y from contact with the weftcarrier. At this same time the picker arm is free to move to throw thecarrier, and as the shaft 46 continues to rotate it will carry thektubes 15 and 16 to the right, whereupon the piston rod 41 will bepushed to the left such an amount as is necessary to cause the pickerarm 24 to relengage thehook 6,2, the cam 35 having carried the otheryhook 62 and its supportingl block 63 to the right Ythe same amount asthe tube 15 moves.. This action will set the picker arm at the left andthe further action of the cam 35 will pull the picker arm 24 to theright far enough for the depending end of thehook 62 to' engage the canisurface of the'right hand screw 68, whereupon that picker arm will bereleased and the weft carrier will be returned .to the left hand end ofthe lay. Before the picker arm is released, however, the cams on theback of` the clamps 42 and 43 will have engaged the cam slides 83 vand84 and will have ,pulledv 'the two rollers 91l down into contact withthe weft carrier, thereby opening the jaws of the same to releasetheyarn carried thereby and to engage a new yarn end, the .operationsbeing repeated in a continuous cycle. The shaft 14 operatesy rotary yarnmeasuring and -holding devices X withinthe casings 1 2 and 13, butIthese devices form the subject-matter of a separate patent vapplication.

The shuttle or weft carrierl is shown at 66 and in order to hold thepicker arm lock tightly. against the lug on the top of the picker arm, aspring 62i'is used. In order to reduce the friction of the cams on thetop ofthe clamps 26, 27 and 442 andl 43, each of the slides 81to 84 isprovided with a Vsmall roller 81', note Fig. 4.

Having thus described my invention what i I claim as new and desire tosecure by Letters Patent of the United States, is as follows,

modifications within the scope of the claims being expressly reserved.

1. In a loom, the combination, withl the picker arm in one position,means to shift lay, of a lpicker arm, means to lock said said picker armuntil ysaid locking means is released, a vacuum cylinder, a piston inthe vacuum cylinder, for operatingsaid picker arm, a second picker arm,a plston in the vacuum cylinder connected with said second arm, and anoperating piston'- between the other two pistonsfor alternately settingthe two picker arms and for producing a vacunm in said cylinder.

2. In a loom7 the combinatiomwith the lay, ol a picker arm, a slide onsaid lay, a hook earrieil by the slide to engage the picker arm andloi-k the same, means to canse said hook 'to be released from the pickerarm, a Vacunm (1s-'linden a piston in the vacuum cylinder, Jr'oroperatlng the picker arm when released. a second picker arm, a pistononneeted therewith, and another piston for alternately setting thepicker arms and for producing a vacuum 1n the cylinder for llrii'ing thepieker arms.

3. In a loom, the combination, with the? lay. ofla picker arm, a slideon said lay, a hook carried thereby to engage and lock the piekenv arm,means to release said hook, a vaciinm cylinder, connections therewithand with the. picker arm for operating the same when released, a shuttlepositioner for the weftearrier, and .means to release said comealongfrom the weft carrier when the' picker arm is released.' A l 4. In aloom, the combination, with the lay, of a picker arm at each endthereof, means to lock said picker arms in one'position, means to shiftthem alternately'until4 the locking means is released, a vacuum chamber,and means connected with the vacuum chamber and each of said pickerarms'i'or operating them.

5. In a loom, the combination, with the la'y, of a picker arm, a slidemovable on the lay, a hook on said slide to engage the picker arm, meansto bring the picker arm into engagement with said hook, means wherebyfurther movement is `given to said slide and picker arm, means torelease said hook at the end of the movement of the picker arm, and avacuum chamber having connections with the picker arm for operating thesame.

stops for alternately disengaging the hooks i from the picker, arms.

In testimony whereof I have hereunto set my hand this 20th day ofJanuary, A. D. 1914, in the presence of the two subscribed v witnesses.f

GEORGE rorsTADA.

Vitnesses:

f C. P. GRIFFIN,

HENRY B. LESTER.

